Air filter

[S40kieran]

When I required my s60 it had one of these green aftermarket k and n type air filters, I've been reading a few other forums and it seems remapped cars need these, I put a stock filter in which I prefer car is quieter with it that's for sure, what would the best course of action be stick with my stock or clean the other filter and shove it back in, I don't think it would make a huge difference tbh but some wiser heads on here that might tell me otherwise. I've also heard these performance filters also let more dirt in any truth in that

[Redbrick]

Keep with the standard air filter and change it more often. My ITG panel filter is sat cleaned on the shelf ready to go but I feel no increase in power using it. (MTE V70 D5)

[htomi]

Stock paper filters are fine, however, if you want a performance filter, then go for a dry filter, washable and re-usable. AEM, Jetex.
K&N is an oiled filter. Oil can be easily overused and that can lead to MAF issues.

[S40kieran]

Thanks lads just as I thought

[LeeT5]

Stock paper filters are fine, however, if you want a performance filter, then go for a dry filter, washable and re-usable. AEM, Jetex.
K&N is an oiled filter. Oil can be easily overused and that can lead to MAF issues.

Sorry bud, but I need to clarify a few things here.

Firstly, stock paper filters are good at doing what they do but they are incredibly restrictive, especially the non R models.
K+N are probably the market leaders in Filter technology and claim an increase of 40% more airflow with their filters. Now there's no doubt that's true, but in the case of the R models, the stock OE paper filter is capable of 400g/m2 of air. This is why they are ok up to about 500bhp, so you probably won't notice any difference. Being a cylindrical filter it has a greater surface area and therefore an increased volume of air flow.

However, if you want induction noise then you need to ditch the OE filter and replace it with an after market type. You'll also need to remove your sound proofing from under the bonnet and remove the lid from the stock air box.
However, this will let in warm air from the engine, especially at slow speeds, so your Air intake temps will rise and performance will suffer. It's a trade off! Do you want Noise....or performance? You can't have both!

Most of them that Htomi listed can be oiled, but it's not necessary to do so! K+N come pre oiled, but this can easily be washed off using a degreaser or mild soap detergent and warm water then air dried.

I have this one....

https://www.dcperformance.co.uk/chea...tx-t80298.html

I do not oil it. I just wash it every 10k when I service my car. After 3 years it will be binned and replaced because no matter how much you clean it, you won't get all the dirt out.

Me, I just went for the looks and did this...

[M-R-P]

Standard all the way.
Mine runs far better with the standard paper filter than anything else I've tried (and I've tried a lot).

[htomi]

Thanks for the clarification Lee!

My point with the dry type filter was to highlight the benefit of the better airflow and less maintenance risk vs the the oiled filters.

[MistralS60]

I've just fitted an oiled Pipercross filter to my S60 2.0T in place of the standard paper one and the engine sounds "cleaner", less boomy on acceleration, no noisier.

So far I think it pulls better and is generally more responsive, but that could be down to the Petrol Magic injector cleaner I also fitted recently. At 107000 miles the car feels like (almost) new.

As to letting in more dirt, I guess I won't know for 100000 miles !

HTH, Keith

[LeeT5]

I've just fitted an oiled Pipercross filter to my S60 2.0T in place of the standard paper one and the engine sounds "cleaner", less boomy on acceleration, no noisier.

So far I think it pulls better and is generally more responsive, but that could be down to the Petrol Magic injector cleaner I also fitted recently. At 107000 miles the car feels like (almost) new.

As to letting in more dirt, I guess I won't know for 100000 miles !

HTH, Keith

Was it pre oiled or did you oil it?

It is a common issue that oiled filters degrade the MAF and will damage it. If only just fitted, you may not notice any difference, but give it a few more thousand miles and you'll start to notice rough running, hesitation and poor idle issues.

[M-R-P]

.... And then try umpteen more air filters, experiencing seemingly unrelated running problems until giving up and selling the car claiming "running issues".
The next owner will then put the standard airbox back on and have a sweet-running car for very little money.

[Redbrick]

So you run an air filter that is supposed to be oiled without oil... what do you think the oil does?

[Doingitsideways]

So you run an air filter that is supposed to be oiled without oil... what do you think the oil does?

Makes the air slippery.
That's why they add so many horsepowers.

Surely everyone knows that?!

[jamesy12345]

Makes the air slippery.
That's why they add so many horsepowers.

Surely everyone knows that?!

mmm...slippery

On another car i forgot all about this and bought an oiled K&N, then realised I didn't want to bugger the MAF and went for a dry type (Cosworth branded for a Scooby)

[LeeT5]

So you run an air filter that is supposed to be oiled without oil... what do you think the oil does?

Absolutely!

I don't live in the Atacama desert you know! I ran a stainless steel Elevate Race filter for over a year with absolutely no problems.
What you worrying about and who says they have to be oiled??

To clean my Jetex filter I first soak it in Fairy liquid and hot water bath for about 20 mins. Then I rinse off and spray Meguires degreaser all over it and let it dwell for 10 mins before a final rinse and then Air dry.
The oil filter service kit is not necessary and, IMH, a waste of money, as I won't be re oiling it.

[MistralS60]

LeeT5, it was pre-oiled.

Should I follow your example and wash off the oil using a degreaser or mild soap detergent and warm water then air dry it ? Is washing-up liquid too strong ?

I live in the intemperate rain Forest of Dean (Glos, UK). I do appreciate this mine of help for old newbies .

[LeeT5]

LeeT5, it was pre-oiled.

Should I follow your example and wash off the oil using a degreaser or mild soap detergent and warm water then air dry it ? Is washing-up liquid too strong ?

I live in the intemperate rain Forest of Dean (Glos, UK). I do appreciate this mine of help for old newbies .

I would spray copious amounts of degreaser over it and let it dwell for 10 minutes, agitating with a clean paint brush if need be to dislodge any dirt. Rinse off then fill a bucket with warm soapy water.....fairy liquid is fine.
Let the filter soak in that for an hour, weight it down if it floats!

Then rinse thoroughly and air dry only.

Then refit.

[Ettienne]

I would spray copious amounts of degreaser over it and let it dwell for 10 minutes, agitating with a clean paint brush if need be to dislodge any dirt. Rinse off then fill a bucket with warm soapy water.....fairy liquid is fine.
Let the filter soak in that for an hour, weight it down if it floats!

Then rinse thoroughly and air dry only.

Then refit.

That's what I did with mine and been perfect last 14k

[M-R-P]

Dishwasher

[hillmangt]

I have run my Merc C320 petrol with twin properly oiled K & N filters for over 60000 miles with no MAF problems whatsoever.
Also my old Vectra and my E30 BMW and others in the past.

[jamesy12345]

Dishwasher

Posh ...although that said, my dish washer can make a cup of tea & cook food also